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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* 浮动会脱离标准流，漂浮在标准流的上方，会压住标准流 */
        div:first-child{
            width: 200px;
            height: 200px;
            background-color: pink;
            float: left;
        }
        div:last-child{
            width: 140px;
            height: 300px;
            background-color: skyblue;
        }
    </style>
</head>
<body>
    <div></div>
    <div></div> 
</body>
</html>